I've had to deal with iron staining the past two years. In early March I did a citric acid treatment and have had the usual long road to get the chlorine level up and to hold. I've also had lots of trouble with getting green water due to adding chlorine too quickly, even if it was just a 16 oz cupful. Sequestrant gets it under control. This summer it's been much, much more sensitive to chlorine making me think the iron content was very high. I took a sample when I left home this morning around 7 and took it to a pool place around 12. They said the metals content was 0. Is it even possible for me to have orange staining that vit C gets rid of, and it not be iron? Same goes for the green pool with the addition of chlorine. The sequestrant makes it go away. I will take another sample to another pool place in the morning.
I did not have a chance to do a water test this morning. My office was taken out in the tornadoes in AL last week, so getting a new office established has things going crazy. My guess is that my FC is probably around 1 which needs to go up. CC could be present, but low if it's there. My TA is around 70. CYA is around 70. Salt is around 3200. pH is around 7.2 or so. Note that this green issue comes and goes regardless with whether my FC is 0 or 5.
Also, I think the iron is getting in from where my slab joint intersects the coping. In one place ants have a nest under the slab, so when there is a heavy rain, so some gets in the pool. Alabama red clay is red because of iron. I'm going to use a semi-rigid epoxy to seal all of these joints.
I'm just sort of at a loss after she said no iron or copper. After getting a second opinion, what would a next step be?